// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_DEVICE_SENSORS_AMBIENT_LIGHT_MAC_H_
#define CONTENT_BROWSER_DEVICE_SENSORS_AMBIENT_LIGHT_MAC_H_

#include <IOKit/IOKitLib.h>
#include <stdint.h>

#include <memory>

#include "base/macros.h"

namespace content {

// Provides an interface to retrieve ambient light data from MacBooks.
class AmbientLightSensor {
public:
    // Create AmbientLightSensor object, return NULL if no valid is sensor found.
    static std::unique_ptr<AmbientLightSensor> Create();

    ~AmbientLightSensor();

    // Retrieve lux values from Ambient Light Sensor.
    bool ReadSensorValue(uint64_t lux_value[2]);

private:
    AmbientLightSensor();

    // Probe the local hardware looking for Ambient Light sensor and
    // initialize an I/O connection to it.
    bool Init();

    // IOKit connection to the local sensor.
    io_connect_t io_connection_;

    DISALLOW_COPY_AND_ASSIGN(AmbientLightSensor);
};

} // namespace content

#endif // CONTENT_BROWSER_DEVICE_SENSORS_AMBIENT_LIGHT_MAC_H_
